Chromogenic Black and White Film
A monochrome film that forms its image from dye couplers rather than silver, and is processed in standard colour chemistry.
Measured in
ISO
In depth
Because it runs through the C-41 process, it can be developed at any high-street lab that still handles colour, which was its entire commercial argument. It has wide latitude and very fine grain, and it scans cleanly since infrared dust removal works on dye images. Its dye-based image is less archivally stable than true silver.
Examples in practice
A chromogenic monochrome film can be processed alongside colour negatives in the same C-41 run.